Related Rule
South Africa
Practice relating to Rule 66. Non-Hostile Contacts between the Parties to the Conflict
Section B. Use of the white flag of truce
South Africa’s LOAC Manual (1996) provides: “A white flag designates a truce, a request to negotiate or an indication of surrender.” 
South Africa, Presentation on the South African Approach to International Humanitarian Law, Appendix A, Chapter 4: International Humanitarian Law (The Law of Armed Conflict), National Defence Force, 1996, § 23; see also § 37(d).
South Africa’s LOAC Teaching Manual (2008) states:
Handling of War Victims
- When combatants surrender, they must clearly indicate this intention, eg by raising their arms and discarding their weapons. Remember, a white flag is NOT only a sign of surrender, but also a sign of a wish to negotiate. 
South Africa, Advanced Law of Armed Conflict Teaching Manual, School of Military Justice, 1 April 2008, as amended to 25 October 2013, Learning Unit 3, p. 192.
[emphasis in original]